Results 21 to 30 of about 1,492,115 (344)
Gravity as an Ultra-low Frequency Scattering Efect
, 2016 Under the weak gravitational field approximation, and, for the 00-component of the stress-energy tensor, Einstein’s field equations reduce to Newton’s model for a gravitational field which is compounded in the Poisson equation for the gravitational potential.
Blackledge, Jonathan
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Design of a LNA for ULF wireless communication
Dianzi Jishu Yingyong, 2021 This paper introduces the design of low noise amplifier, using for ultra-low frequency. There′s a new loop in the paper, formed by a low-pass transconductance and a self-cascode MOSFET, proposed to stabilize the output bias voltage of the amplifier.
Zhang Mengwen, Jin Yufeng
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Radial Gradient Seismic Metamaterials with Ultra-Low Frequency and Ultra-Wide Band Gap
Applied Sciences, 2023 In this paper, a radial gradient seismic metamaterial (RGSM) is proposed. The structural unit cell is composed of an external square soil embedded with a triangular-cross-sectioned steel ring, which is filled at different angles of multiple steel rings ...
Qian Yang +4 more
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Ultra-Low-Frequency Acoustic Black Hole Radial Elastic Metamaterials
Applied Sciences, 2023 In this paper, we propose an acoustic black hole radial elastic metamaterial (AREM). Through the study of its dispersion relations, it is found that, compared with the conventional elastic metamaterial, the AREM gathers energy at the tip of the black ...
Lixia Li, Haiteng Hu, Xiaolan Wu
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Inertially amplified seismic metamaterial with an ultra-low-frequency bandgap
Applied Physics Letters, 2022 In last two decades, it has been theoretically and experimentally demonstrated that seismic metamaterials are capable of isolating seismic surface waves.
Yi Zeng +9 more
semanticscholar +1 more source
Ultra-low-noise Microwave to Optics Conversion in Gallium Phosphide
, 2021 Mechanical resonators can act as excellent intermediaries to interface single photons in the microwave and optical domains due to their high quality factors.
Moritz Forsch (7405349) +7 more
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Geophysical Research Letters, 2022 Ultra‐low frequency (ULF) waves significantly contribute to transferring energy and transporting particles in the coupled magnetosphere‐ionosphere system.
Boyi Wang +3 more
semanticscholar +1 more source
ULTRA LOW FREQUENCY EMISSIONS RANGING FROM 0.1 TO 3 Hz IN CIRCUMPOLAR AREAS
Solar-Terrestrial Physics, 2020 We examine the characteristics of oscillations of two types in the high-frequency edge of the ULF range (0.1–3 Hz), serpentine emission (SE), and discrete frequency dispersed signals (DS).
A.S. Potapov +2 more
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Tidal modulation of very-low-frequency and ultra-low-frequency ambient noise levels
JASA Express Letters, 2023 Several years of continuous low-frequency underwater ambient noise data from 0.1 to 125 Hz have been made available for examination by the United Nations Comprehensive Nuclear Test Ban Treaty Organization. Narrow-band noise time records between 0.5 and 10 Hz were selected for study, chosen deliberately to address noise sources tied primarily to the ...
Anthony I, Eller +2 more
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Low-frequency GMRT observations of ultra-cool dwarfs [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Observations of radio emission in about 10 per cent of ultra-cool dwarfs (UCDs) indicate the presence of strong, persistent magnetic fields in these stars. These results are in contrast to early theoretical expectations on fully-convective dynamos, and to other tracers of magnetic activity, such as H α and X-ray luminosity. Radio-frequency observations
Zic, Andrew +4 more
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